{"id":"GHSA-9xwc-vwww-qqmw","revision":"4500a3ee8feb45c2a9e6ea535876cce0","records":[{"revision":"4500a3ee8feb45c2a9e6ea535876cce0","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-9xwc-vwww-qqmw","aliases":[],"title":"Duplicate Advisory: Vikunja: Link-share principal-type confusion enables cross-account team removal, bot takeover, and roster disclosure","description":"### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-32r8-5843-4qw2. This link is maintained to preserve external references.\n\n### Original Description\nVikunja through 2.4.0 contains a principal-type confusion vulnerability where LinkSharing principals with id N are treated as user principals with users.id == N at three permission checks lacking type guards. Attackers with a link-share JWT can remove victims from teams, enumerate and delete victim bot users, or read team rosters by exploiting id collisions in the autoincrement space.","state":2,"publishedAt":"2026-08-19T15:32:33+00:00","modifiedAt":"2026-10-09T21:00:05.3222339+00:00","affected":[{"ecosystem":"Go","name":"code.vikunja.io/api","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"last_affected","version":"2.4.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","score":null,"severity":null},{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/go-vikunja/vikunja/security/advisories/GHSA-32r8-5843-4qw2","https://nvd.nist.gov/vuln/detail/CVE-2026-76216","https://www.vulncheck.com/advisories/vikunja-through-principal-type-confusion-via-linksharing"],"sourceUrl":"https://github.com/advisories/GHSA-9xwc-vwww-qqmw","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-9xwc-vwww-qqmw","identifiers":["GHSA-9xwc-vwww-qqmw"]},"retained":false,"historicalAffected":[]}],"coverage":[]}